Bolster guide-block.



No. 703,503. Patentd July I, I902.

N. H. TUNKS.

BOLSTER GUIDE BLDCK.

(Applicatiqn filed Oct. 24, 1901.) v (No Model.) 2 s eets-Shem l mlllllm Wine/n01 0%; 2mm am 7% am No. 703,503 Patented July I; I902.

' N. H. TUNKS.

BOLSTER GUIDE BLOCK.

(Application fl1ed-Oct.24, 190;.) 4

I' 2 Sheets-Sheet 2.-

(NdModelJ "mzy onm's im-rzns 00.. monxumo. WASHINGTON, at:

UN TED STATES- 1 PATENT OFFICE.

NELSON H. TUNKS, OF TOLEDO, OHIO, ASSIGNOR TO FRANK B. HARRISON, OF TOLEDO, OHIO.

BOLSTER GU IDE BLOCK.

SPECIFICATION forming part of Letters Patent No. 703,503, dated July 1, 1902. Application filed October 24,1901. 's'eriaino. 79,864. (No model.)

To aZl whom itmcty concern.-

Be it known that-I, NELsoN H. TU1 IKs,aciti zen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented a new and useful Bolster Guide: Block, of which the following is a specification.

The object of my invention is the provision of improved means for controlling the endwise and vertical movements of a car-truck bolster relative to the truck-frame.

My invention consists in the combination, with the bolster, of a guide. or guide-block which is adapted to move relative to the same. g

It further consists in certain novelties of construction and combinations of parts hereinafter set forth and claimed.

The accompanying drawings illustrate two examples of the physical embodiment of my invention constructed according to the best modes I have so far devised for the practical application of the principle.

Figure 1 shows a car-truck in end elevation with a part of the frame and a guide-bar broken away, so as to disclose the location of I any person familiar with the art.

the guide-block upon the end of the bolster. Fig. 2 is a rear'view of a'guide adapted for use witha wooden bolster. Fig. 3 is a section of Fig. 4. Fig.4 is afront View ofthe guide shown in Fig. 2. Figs. 5, 6, and 7 are respectively rear, sectionahandfront views of an example of the guide adapted for use with a Haskell & Barker or other truck-bolster, the vertical face or side of i which is irregular in shape or other than a plain surface.

Referring to the several figures, the-letter A designates a car truck bolster; B, the

spring-plank; O, one of thebolst'erguide-' bars, which are located each side of the end of a bolster; D, thetop arch-bar of a dia-' mond truck-frame; E, the bottom arch and tie bars; F, one of the guide-bar bolts; G, the springs located 'upon the end of the spring-plank and beneath the end of the bolster; H, my improved guide or guide-block;- I, the base-piece of the guide-block J, a boss upon the rear side of the base-piece; L, bolts which secure the base-piece to the bolster, and

these bolts may extend entirely through the bolster end and also pass through the basepiece'upon the opposite side of the bolster end, securing opposite guide-blocks in their proper positions; M, a recessed seat in the face or front portion of the base-piece; N, a rotary flanged guide, which may be of any desirable shape, but which in the examples is shown of a circular form; 0, the flanges of the guide-piece, and P a trunnion upon the guide piece and located within the hole K of the base.

In the second example (shown by Figs. 5, 6, and 7) slight modifications are introduced,

so that the base-piece will fit a bolster, end,

which has an irregular-shaped face, such as I or E beams or a casting or the edges of a trussed' metallic bolster, &c. The letter P designates a pin or cotter passed through the end of the trunnion to hold the flanged guidepiece. R designates the vertical and longitudinal strengthening-flanges of the basepiece, and S designates perforated lugs by which the base-piece is secured to the bolster end.

The assembling of the parts is obvious to In common practice the well-known type of bolster guide-block is rigidly secured to the end of the bolster or cast integral with it,

and the flanges thereof,which are in parallel from side to side and when the bolster end moves upwardly and downwardly upon the spring or springs, the bolster leaves its normal position, which is in a plane parallel with the top surface of the track-rails and occupies a positionoblique to the said rails. It

is clear thatwhen thus disposed the flanges of the guide-block will not be parallel with the edges of the guide-bar, andconsequently the guide block and bar will bind and the bar or frame of the truck become distorted and racked. The same conditions will exist 7 when the springs at the opposite ends of the spring-plank are'of unequal power, allowing the bolster to normally occupy an oblique position, and, moreover, when the frame is out of square or one side thereof has sagged, and when the end of the bolster is nearer one wheel than the other, an analogous condition will prevail.

The application of my improvement will allow a free movement of a bolster end under all conditions of service, inasmuch as the flanged guides can rotate about the trunnion, and when the hole K is somewhat larger than the diameter of the trunnion the guide-piece can move in a horizontal plane. The use of my guide-piece will result in preventing the wear ofthe guide and guide-bar. The guidebar, guide block, and bolts will not become broken, the arch-bars will not become distorted, the brasses will wear more evenly, and the frame will be kept approximately square, inasmuch as the cramping or binding of the parts will be obviated.

\Vhile I have illustrated and described only two examples of the physical embodiment of my invention,I do not thereby intend to confine the scope thereof to such pictured examples, for the construction, shape, and form of the guide-block can be modified at will. The type of bolster used will determine the construetion of the guide-block and the manner of its application. I may use the flanged guideindependentof the base-piece, and such use is perhaps desirable in connection with a cast bolster where the hole for the trunnion may be made in the east bolster.

All modifications and modes of application of the invention I intend to embrace within the scope of the claims.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination with a truck-bolster and a truck guide-bar, of a guide-piece, movable relative to the bolster.

2. The combination with a truck bolster and guide-bar, of a rotary guide-piece.

3. The combination with a truck bolster and guide-bar, of a guide-piece having an endwise motion.

4i. The combination with a truck bolster and guide-bar, of a guide-piece having a ro-' tary and an endwise motion.

5. The combination With a truck bolster and guide-bar, of amovable guide-piece having a trunnion.

' 6. The combination with a truck bolster and guide-bar,of a guide-piece having flanges, and movable relative to the bolster.

7. The combination with a truck bolster and guide-bar, of abase-piece and a guidepiece, movable relative to the base-piece.

8. The combination with a truck bolster and guide-bar, of a base-piece having a hole, and a guide-piece provided with a trunnion.

9. The combination with a truck bolster and a guide-bar, of a base-piece having a seat, and a movable guide-piece located within the seat.

10. A bolster guide-block consisting of a base-piece, and a guide-piece, movable relative to the base-piece.

11. Abolster guide-block consisting of a base-piece having flanges and a movable guide-piece.

12. A bolster guide-block consisting of a base-piece having a seat, and a flanged and movable guide-piece.

13. A bolster guide-block consisting of a base-piecehavingahole anda movable guidepiece provided with a trunnion.

14. A guide for a truck -bolster having flanges and a trunnion; the said guide being adapted to rotate when applied to said bolster.

15. A movable guide for a truck-bolster provided with flanges to embrace the edges of a guide-bar; and also having means for uniting the same to the end of a bolster in such a manner that the said guide can move relative to the bolster.

In testimony whereof I affix my signature in presence of two witnesses.

NELSON II. TUNKS.

\Vitnesses:

F. 15. HARRISON, F. M. DOTSON. 

